Set the timer to 177 seconds

How to use the online timer

A proper warm-up doesn't need to be long, and 177 seconds is enough to get your muscles moving and your heart rate up before you jump into the main session. Start the clock, run through a few dynamic stretches or some light cardio, and let the beep tell you when to switch rather than cutting it short because you're keen to get started. Rushing this bit just costs you later.

Press Start and away it goes, counting down on its own without needing you to babysit it every few seconds. The only real rule is keeping this browser tab open, since the countdown pauses along with the page if you close it or shut the browser down entirely. Right at zero, a sound plays to let you know time's up, clear enough to hear from the next room over.

A browser timer beats digging out the one kitchen timer that's always gone missing, and it's one less thing cluttering your phone alongside a dozen apps you barely open. Everything runs here in the tab, so there's no download, no account, and no permissions to grant before you can start it. Free, with no registration, it's ready the moment you load the page and gone the moment you close it. If you would rather say put a timer on for 177 seconds, that works too — press Start and the page does the rest.